20396120

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{571}}^1$

素因数の和:648

約数の個数: 64

約数和(自身を含む): 49420800

約数和(自身を除く): 29024680

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 47, 76, 94, 95, 152, 188, 190, 235, 376, 380, 470, 571, 760, 893, 940, 1142, 1786, 1880, 2284, 2855, 3572, 4465, 4568, 5710, 7144, 8930, 10849, 11420, 17860, 21698, 22840, 26837, 35720, 43396, 53674, 54245, 86792, 107348, 108490, 134185, 214696, 216980, 268370, 433960, 509903, 536740, 1019806, 1073480, 2039612, 2549515, 4079224, 5099030, 10198060, 20396120]

約数ペア:

[(1, 20396120), (2, 10198060), (4, 5099030), (5, 4079224), (8, 2549515), (10, 2039612), (19, 1073480), (20, 1019806), (38, 536740), (40, 509903), (47, 433960), (76, 268370), (94, 216980), (95, 214696), (152, 134185), (188, 108490), (190, 107348), (235, 86792), (376, 54245), (380, 53674), (470, 43396), (571, 35720), (760, 26837), (893, 22840), (940, 21698), (1142, 17860), (1786, 11420), (1880, 10849), (2284, 8930), (2855, 7144), (3572, 5710), (4465, 4568)]